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A218389
Numbers k such that the k-th triangular number contains only digits {0,2,4}.
2
8944, 2209995667055, 6957333458215, 20001000974971249775
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OFFSET
1,1
COMMENTS
No other terms below 1.4*10^20.
LINKS
Table of n, a(n) for n=1..4.
G. Resta,
Tridigital Triangular Numbers
CROSSREFS
Cf.
A000217
,
A218390
. See
A119034
for a table of cross-references.
Sequence in context:
A259631
A251921
A217604
*
A180298
A322537
A172637
Adjacent sequences:
A218386
A218387
A218388
*
A218390
A218391
A218392
KEYWORD
base
,
nonn
,
more
AUTHOR
Max Alekseyev
, Oct 27 2012
STATUS
approved
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Last modified May 16 05:56 EDT 2024. Contains 372549 sequences. (Running on oeis4.)